This is a support site for MyFreeForum. This is not a 'we do everything for you' forum.
There are several artwork forums that help make artwork for you, but even with that kind of request you wouldn't get anything because you have given zero information about what size you want it etc.
And if you are wanting that overly large image as a rank, then you would have to add it as a custom rank as I doubt admin would put that on the system.
To install custom ranks refer to the tutorial video rather aptly titled: Adding Custom ranks to your free forum